I repair a water-cooled central air-conditioning, cooling, compressor sometimes frosting, high pressure as long as 0.6. Low pressure reaches 1.5. The pressure is abnormal. Master how such a situation should be repaired?. Please put it in detail, thank you.
Super abnormal, how low to 1.5? High pressure only 0.6? Check the compressor is not so
Check the leak point, the feeling is that there is a leak point or else can not be like, there is that you want to check with soap bubbles, specific leakage point in deciding whether to repair or replace a new one
If it is R22 refrigerant, obviously less refrigerantMaintenance method:Check the leak point and repair the leak point. Pressure leak test. Vacuum treatment, supplementary refrigerantCompressor frosting:The coolant is cooled by the lack of refrigerant, the exhaust temperature reaches the liquid ejection setpoint, and the liquid ejection action results
A large number of compressors return liquid, causing the compressor body to freeze at low pressure.This situation is very dangerous, because of low temperature and low pressure liquid refrigerant more directly back to the compressor to evaporation in the compressor, it is easy to cause the compressor because of "liquid hammer" and seriously damaged, it is recommended to disable air conditioning and troubleshooting.The approximate cause of failure is the type:1, abnormal freezing water pump or filter clogging, resulting in abnormal cooling water flow;2, throttling parts (expansion valve) abnormal working state, resulting in excessive refrigerant flow;3, the evaporation side (use side) fan motor abnormal, resulting in lower evaporation pressure of air-conditioning system, refrigerant can not be effective evaporation, etc..Only after finding the problem and solving the problem can the air conditioning unit be re opened. The air conditioning system should be checked regularly during the use of air conditioning. The problem cannot be detected until the ice is frozen.
